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Boiler plants

Control emissions. Optimise boiler settings.
The flue gas analysers testo 340 and testo 350.

Whether as water tube boilers, shell boilers, for thermal output air cleaning or for marine boiler systems: anyone who installs a boiler nowadays can resort to technologies which consume far less energy and pollute the environment less than was the case 15 years ago. Nevertheless, the combustion technology on industrial burners with a service life of 30 to 40 years has to be updated two to three times on average. Because the statutory emissions limit values are getting more and more strict, especially for NOx. For this reason, emissions values are determined on boilers and burners during commissioning, maintenance and for high-precision emissions measurements (e.g. as preparation for an official measurement).

The cost-effectiveness of the system and the setting of the burner can be clearly assessed on this basis. In addition, it is ensured that the system complies with the legally established maximum values for flue gas loss and emissions.

Good for the climate. And for the balance sheet.

Reducing emissions and energy costs

Ensuring the efficiency of boiler plants

When analyzing the burner’s behaviour, the focus of attention is often on fuel supply, atomization, control behaviour and emissions values.

But experienced service technicians know:

  • For a wide control range, stable combustion and best emission values, the optimal supply of air is crucial.

  • Therefore, it must be ensured that fans, air ducts and controls are coordinated with each other.

So for every combustion process there is an optimal ratio of fuel and air supply. In this area, the combustion plant operates with a stable flame, the best efficiency and the lowest emissions. The challenge for the service technician is to determine the optimum air ratio and adjust the system accordingly.

How the changes to the fuel-air mixture can be optimally adjusted in detail varies depending on the boiler manufacturer, fuel type and control scheme. Some burners control the amount of air introduced into the boiler, others the amount of fuel and still others allow both parameters to be set. In any case, it is important to know the exact amount of oxygen in the process for safe and economical operation.

The flue gas analysers in comparison

testo 340

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Efficient service measurements with the testo 340

  • Self-cleaning effect in the special hose (PTFE): condensate and dirt particles do not adhere

  • Easy setting: the hose extension (up to 7.8 m) means you can see the boiler display even in measuring locations which are a long way away

  • No downtimes due to pre-calibrated and exchangeable gas sensors

  • Measuring range extension (factor 5): unrestricted measurement of high concentrations (CO up to 50,000 ppm)

  • Always ready to use thanks to robust, low-maintenance technology

testo 350

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High-precision emission measurements with the testo 350

  • Integrated gas preparation for precise (dry) results even in the case of unsupervised long-term measurements

  • Bluetooth connection allows comfortable work even in the case of long distances (up to 100 m with no obstructions) between the Control Unit and measuring location

  • Suitable for official emissions measurements (country-dependent)

  • Measuring range extension (factor 2, 5, 10, 20 or 40 times): unrestricted measurement of high concentrations (CO up to 400,000 ppm with factor 40)

  • Suitable for use with biogas and the measurement of SO₂ and H₂S


Influencing and measured variables for burner and boiler systems

Generating electricity, heating buildings or producing glass and cement - burner and boiler systems provide the necessary thermal energy. And to ensure that the combustion process runs as economically and environmentally friendly as possible, service technicians have to trim the plant optimally. In our new white paper you will find all relevant topics around flue gas analysis and plant trimming.

Go to reading sample

The chemical reactions during combustion

The influence of the air ratio on efficiency and emissions

The optimum setting of the system with testo 340 and testo 350

And much more...

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